US6159663A - Method of creating a solderable metal layer on glass or ceramic - Google Patents

Method of creating a solderable metal layer on glass or ceramic Download PDF

Info

Publication number
US6159663A
US6159663A US09/107,475 US10747598A US6159663A US 6159663 A US6159663 A US 6159663A US 10747598 A US10747598 A US 10747598A US 6159663 A US6159663 A US 6159663A
Authority
US
United States
Prior art keywords
containing mixture
aluminum containing
mixture surface
remaining
photoresist
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/107,475
Inventor
James R. Murray, Sr.
Burhan Osmat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harris Corp
Intersil Americas LLC
Original Assignee
Intersil Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Assigned to HARRIS CORPORATION reassignment HARRIS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MURRAY, JAMES R., OZMAT, BURHAN
Priority to US09/107,475 priority Critical patent/US6159663A/en
Application filed by Intersil Corp filed Critical Intersil Corp
Assigned to INTERSIL CORPORATION reassignment INTERSIL CORPORATION AMEND TO ADD PROPERTIES RECORDED ON REEL 10247, FRAME 0043. Assignors: HARRIS CORPORATION
Assigned to CREDIT SUISSE FIRST BOSTON, AS COLLATERAL AGENT reassignment CREDIT SUISSE FIRST BOSTON, AS COLLATERAL AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INTERSIL CORPORATION
Publication of US6159663A publication Critical patent/US6159663A/en
Application granted granted Critical
Assigned to MORGAN STANLEY & CO. INCORPORATED reassignment MORGAN STANLEY & CO. INCORPORATED SECURITY AGREEMENT Assignors: D2AUDIO CORPORATION, ELANTEC SEMICONDUCTOR, INC., INTERSIL AMERICAS INC., INTERSIL COMMUNICATIONS, INC., INTERSIL CORPORATION, KENET, INC., PLANET ATE, INC., QUELLAN, INC., TECHWELL, INC., ZILKER LABS, INC.
Assigned to INTERSIL CORPORATION reassignment INTERSIL CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CREDIT SUISSE FIRST BOSTON
Assigned to Intersil Americas LLC reassignment Intersil Americas LLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERSIL AMERICAS INC.
Assigned to INTERSIL AMERICAS INC. reassignment INTERSIL AMERICAS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INTERSIL COMMUNICATIONS, INC.
Assigned to INTERSIL COMMUNICATIONS, INC. reassignment INTERSIL COMMUNICATIONS, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERSIL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/48Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
    • H01L21/4814Conductive parts
    • H01L21/4846Leads on or in insulating or insulated substrates, e.g. metallisation
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/22Secondary treatment of printed circuits
    • H05K3/24Reinforcing the conductive pattern
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/09Use of materials for the conductive, e.g. metallic pattern

Definitions

  • the invention relates to a method of creating a solderable metal layer on a ceramic, glass, or glass ceramic member.
  • a layer of an aluminum containing mixture is deposited on the ceramic, glass, or glass ceramic member by ion vapor deposition creating a metalized ceramic member.
  • the aluminum containing mixture is cleaned, dried, and heated and a photoresist is placed on the aluminum.
  • a photomask is place on the photoresist and the exposed portions of the photoresist are exposed to a light source.
  • the photomask is removed and the portions of the photoresist that were exposed to the light source is stripped off to selectively expose the underlying aluminum containing mixture.
  • the selectively exposed aluminum containing mixture is removed with an aluminum etchant exposing the underlying ceramic, glass, or glass ceramic member.
  • the remaining portions of the photoresist are stripped off exposing the remaining aluminum containing mixture.
  • the remaining aluminum containing mixture is plated with a metal corrosion barrier.
  • the metal corrosion barrier is then plated with a solderable layer.
  • the resulting structure provides solderable and adherent metal layers with high ductility and high electrical and thermal conductivities.
  • Devices fabricated using the disclosed method are required by modern microelectronics packages consisting of discrete semiconductor power devices or power modules having multiple semiconductor power devices. There are myriad applications for devices fabricated with the disclosed method such as lid arrays for discrete power devices and thermal bases of multi power device modules.
  • Such devices improve the cost, performance, yield, and reliability of metalized ceramic members.
  • FIG. 1 is a flow chart indicating the steps for creating a solderable layer on aluminum deposited on a ceramic, glass, or glass ceramic member.
  • FIG. 1 shows the steps required to perform the invention in one embodiment of the invention.
  • a ceramic member is coated with a layer of aluminum by ion vapor deposition.
  • the aluminum layer is typically 2 mils to 2.5 mils thick in order to be able to carry the required electrical current, for example in a microelectronics package.
  • the aluminum layer mixture could also have a thickness of at least 2 mils in other examples.
  • the aluminum layer is then cleaned, heated, and dried to ensure proper application of the photoresist to the aluminum layer.
  • the aluminum is cleaned with a cleanser and scrub brush to remove aluminum oxide.
  • the aluminum is then rinsed with water. This cleaning and rinsing is repeated until the water ceases to bead on the aluminum surface indicating that the aluminum oxide has been removed. Removal of aluminum oxide is important to maximize the free energy of the aluminum surface to assure proper wetting and bonding of the photoresist.
  • the aluminum is then dried to prevent the formation of water spots or the aluminum surface and then heated at 75° C. for approximately 15 minutes to ensure even heating across the aluminum surface in preparation for the application of a photoresist.
  • a photoresist such as a dry film photoresist approximately 1.5 mils thick, can be applied to the aluminum layer.
  • the dry film photoresist could be applied to the aluminum layer at a pressure greater than atmospheric pressure.
  • a photomask is applied on the photoresist to mask selected portions of the exposed surface of the photoresist film.
  • the aluminum-layered ceramic member with the photoresist and photomask is exposed to a negative pressure of at least 20 in. Hg to ensure that the photomask is tightly held to the photoresist. While maintaining the negative pressure of at least 20 in. Hg., the unmasked portions of the photoresist are exposed to an ultraviolet ("UV") light source until a light intensity of 30 light units (3,000 lumens) is achieved. After exposure of the unmasked portions of the photoresist to a UV light source, the negative pressure is removed and the photomask is separated from the photoresist.
  • UV ultraviolet
  • the photoresist is then hard baked by heating the photoresist at 95° C. ⁇ 3° C. for approximately 30 minutes.
  • This hard baking is essential to increase the toughness and the chemical resistance of the portions of the photoresist that were not exposed to the UV light source so that the non UV-exposed portions of the photoresist can withstand the abrasiveness of the aluminum etchant.
  • the non UV-exposed portions of the photoresist may be degraded by the aluminum etchant acids thereby causing unwanted removal of the aluminum layer under the non UV-exposed photoresist.
  • the portions of the photoresist that were exposed to the UV light source are removed by immersion in an aqueous developing solution until the UV-exposed photoresist is removed, approximately 2 to 3 minutes in duration.
  • the exposed aluminum layer is etched with an aluminum etchant consisting of phosphoric acid, nitric acid, and acetic acid for approximately 45 minutes, depending on the thickness of the aluminum layer, to selectively remove the aluminum to expose the ceramic member.
  • an aluminum etchant consisting of phosphoric acid, nitric acid, and acetic acid for approximately 45 minutes, depending on the thickness of the aluminum layer, to selectively remove the aluminum to expose the ceramic member.
  • spray etching of the aluminum layer is preferred to immersion etching to minimize undercut removal of the aluminum layer under the non UV-exposed photoresist.
  • the exposed ceramic member is then rinsed with water to remove any excess etchant. When spray etching is utilized the exposed surface of the member could be rinsed in water for at least two minutes.
  • the remaining photoresist is removed by immersing the photoresist into an alkaline photoresist stripping solution for approximately five minutes to expose the remaining aluminum.
  • the remaining aluminum is then cleaned and dried in a similar fashion as during preparation for applying the photoresist.
  • the remaining aluminum is cleaned with a cleanser and scrub brush to remove aluminum oxide.
  • the remaining aluminum is then rinsed with water. This cleaning and rinsing is repeated until the water ceases to bead on the remaining aluminum surface indicating that the aluminum oxide has been removed. Removal of aluminum oxide is important to maximize the free energy of the remaining aluminum surface to assure proper deposition of a metallic corrosion inhibiting layer.
  • the remaining aluminum is then dried to prevent the formation of water spots on the remaining aluminum surface and then cleaned with acetone to remove any remaining residue from the remaining aluminum surface. The cleaning with acetone could also be in an agitated bath of acetone for 3 minutes.
  • the remaining aluminum is then inserted in an agitated acid bath of 3% hydrochloric acid, 3% nitric acid, and 94% demineralized water for approximately 3 minutes to remove any remaining contaminants and to lightly roughen the surface of the remaining aluminum in preparation for plating of a metal corrosion barrier to the surface of the remaining aluminum.
  • a metal corrosion barrier is then plated on the remaining aluminum to prevent the aluminum from reacting with a later-applied solderable layer of gold or silver.
  • a typical metal corrosion barrier consists of nickel but any metal that does not react with the solderable barrier can be applied.
  • One useful method of applying a corrosion barrier of nickel to the remaining aluminum is to immerse the remaining aluminum in an electroless nickel plating solution for approximately 20 minutes. Electroless deposition of the metal corrosion barrier eliminates the need to have the remaining aluminum electrically connected. The metal corrosion barrier surface is then rinsed with demineralized water. Demineralized water is used to minimize the occurrence of any residual minerals on the surface of the metal corrosion barrier. The presence of minerals on the metal corrosion barrier will impair the adhesion of the solderable layer to the corrosion barrier. Rinsing with non-demineralized water is acceptable as long as any residual minerals are removed before plating the metal corrosion barrier with the solderable layer.
  • a solderable layer is then plated on the metal corrosion barrier.
  • a typical solderable layer consists of either gold or silver.
  • One useful method of applying a solderable layer of gold to the metal corrosion barrier is to immerse the metal corrosion barrier in an electroless gold plating solution for approximately 30 minutes. Electroless deposition of the solderable layer eliminates the need to have the metal corrosion barrier electrically connected. The solderable layer is rinsed with demineralized water and dried.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A method for creating a solderable metal layer on a ceramic, glass, or glass ceramic member is described. The described method deposits an aluminum containing mixture on the member by ion vapor deposition creating a metalized ceramic member. A photoresist is applied to the metalized ceramic member. A photomask is applied to the photoresist and the photoresist is exposed to light. After the photomask and exposed photoresist are stripped off, the underlying aluminum containing mixture is removed with an etchant. The remaining photoresist is removed and a metal corrosion inhibiting layer is deposited on the remaining aluminum containing mixture. A solderable layer is then deposited on the metal corrosion inhibiting layer.

Description

BACKGROUND OF THE INVENTION
The invention relates to a method of creating a solderable metal layer on a ceramic, glass, or glass ceramic member.
A layer of an aluminum containing mixture is deposited on the ceramic, glass, or glass ceramic member by ion vapor deposition creating a metalized ceramic member. The aluminum containing mixture is cleaned, dried, and heated and a photoresist is placed on the aluminum. A photomask is place on the photoresist and the exposed portions of the photoresist are exposed to a light source. The photomask is removed and the portions of the photoresist that were exposed to the light source is stripped off to selectively expose the underlying aluminum containing mixture. The selectively exposed aluminum containing mixture is removed with an aluminum etchant exposing the underlying ceramic, glass, or glass ceramic member. The remaining portions of the photoresist are stripped off exposing the remaining aluminum containing mixture. The remaining aluminum containing mixture is plated with a metal corrosion barrier. The metal corrosion barrier is then plated with a solderable layer.
The resulting structure provides solderable and adherent metal layers with high ductility and high electrical and thermal conductivities. Devices fabricated using the disclosed method are required by modern microelectronics packages consisting of discrete semiconductor power devices or power modules having multiple semiconductor power devices. There are myriad applications for devices fabricated with the disclosed method such as lid arrays for discrete power devices and thermal bases of multi power device modules.
Such devices improve the cost, performance, yield, and reliability of metalized ceramic members.
Accordingly, it is an object of the present invention to provide a novel method for fabricating a solderable layer on a metalized ceramic, glass, or glass ceramic member.
It is another object of the present invention to provide a novel method for creating a solderable layer on a metalized ceramic, glass, or glass ceramic member on the top, bottom, and through holes of the member.
It is yet another object of the present invention to provide a novel method for creating solderable layers on a metalized ceramic, glass, or glass ceramic member that provide high ductility, high electrical conductivity, and high thermal conductivity.
It is still another object of the present invention to provide a novel method for creating solderable layers on a metalized ceramic, glass, or glass ceramic member that improves the cost, performance, yield, and reliability of metalized ceramic, glass, or glass ceramic members.
These and many other objects and advantages of the present invention will be readily apparent to one skilled in the art to which the invention pertains from a perusal of the claims, the appended drawing, and the following detailed description of the preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a flow chart indicating the steps for creating a solderable layer on aluminum deposited on a ceramic, glass, or glass ceramic member.
DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1 shows the steps required to perform the invention in one embodiment of the invention.
As an illustrative example, a ceramic member is coated with a layer of aluminum by ion vapor deposition. The aluminum layer is typically 2 mils to 2.5 mils thick in order to be able to carry the required electrical current, for example in a microelectronics package. The aluminum layer mixture could also have a thickness of at least 2 mils in other examples.
The aluminum layer is then cleaned, heated, and dried to ensure proper application of the photoresist to the aluminum layer. The aluminum is cleaned with a cleanser and scrub brush to remove aluminum oxide. The aluminum is then rinsed with water. This cleaning and rinsing is repeated until the water ceases to bead on the aluminum surface indicating that the aluminum oxide has been removed. Removal of aluminum oxide is important to maximize the free energy of the aluminum surface to assure proper wetting and bonding of the photoresist. The aluminum is then dried to prevent the formation of water spots or the aluminum surface and then heated at 75° C. for approximately 15 minutes to ensure even heating across the aluminum surface in preparation for the application of a photoresist.
A photoresist, such as a dry film photoresist approximately 1.5 mils thick, can be applied to the aluminum layer. The dry film photoresist could be applied to the aluminum layer at a pressure greater than atmospheric pressure. A photomask is applied on the photoresist to mask selected portions of the exposed surface of the photoresist film. The aluminum-layered ceramic member with the photoresist and photomask is exposed to a negative pressure of at least 20 in. Hg to ensure that the photomask is tightly held to the photoresist. While maintaining the negative pressure of at least 20 in. Hg., the unmasked portions of the photoresist are exposed to an ultraviolet ("UV") light source until a light intensity of 30 light units (3,000 lumens) is achieved. After exposure of the unmasked portions of the photoresist to a UV light source, the negative pressure is removed and the photomask is separated from the photoresist.
The photoresist is then hard baked by heating the photoresist at 95° C.±3° C. for approximately 30 minutes. This hard baking is essential to increase the toughness and the chemical resistance of the portions of the photoresist that were not exposed to the UV light source so that the non UV-exposed portions of the photoresist can withstand the abrasiveness of the aluminum etchant. Without hard baking, the non UV-exposed portions of the photoresist may be degraded by the aluminum etchant acids thereby causing unwanted removal of the aluminum layer under the non UV-exposed photoresist. The portions of the photoresist that were exposed to the UV light source are removed by immersion in an aqueous developing solution until the UV-exposed photoresist is removed, approximately 2 to 3 minutes in duration.
The exposed aluminum layer is etched with an aluminum etchant consisting of phosphoric acid, nitric acid, and acetic acid for approximately 45 minutes, depending on the thickness of the aluminum layer, to selectively remove the aluminum to expose the ceramic member. Where the design tolerances for the finished product require precise etching, spray etching of the aluminum layer is preferred to immersion etching to minimize undercut removal of the aluminum layer under the non UV-exposed photoresist. The exposed ceramic member is then rinsed with water to remove any excess etchant. When spray etching is utilized the exposed surface of the member could be rinsed in water for at least two minutes.
The remaining photoresist is removed by immersing the photoresist into an alkaline photoresist stripping solution for approximately five minutes to expose the remaining aluminum.
The remaining aluminum is then cleaned and dried in a similar fashion as during preparation for applying the photoresist. The remaining aluminum is cleaned with a cleanser and scrub brush to remove aluminum oxide. The remaining aluminum is then rinsed with water. This cleaning and rinsing is repeated until the water ceases to bead on the remaining aluminum surface indicating that the aluminum oxide has been removed. Removal of aluminum oxide is important to maximize the free energy of the remaining aluminum surface to assure proper deposition of a metallic corrosion inhibiting layer. The remaining aluminum is then dried to prevent the formation of water spots on the remaining aluminum surface and then cleaned with acetone to remove any remaining residue from the remaining aluminum surface. The cleaning with acetone could also be in an agitated bath of acetone for 3 minutes.
The remaining aluminum is then inserted in an agitated acid bath of 3% hydrochloric acid, 3% nitric acid, and 94% demineralized water for approximately 3 minutes to remove any remaining contaminants and to lightly roughen the surface of the remaining aluminum in preparation for plating of a metal corrosion barrier to the surface of the remaining aluminum.
A metal corrosion barrier is then plated on the remaining aluminum to prevent the aluminum from reacting with a later-applied solderable layer of gold or silver. A typical metal corrosion barrier consists of nickel but any metal that does not react with the solderable barrier can be applied.
One useful method of applying a corrosion barrier of nickel to the remaining aluminum is to immerse the remaining aluminum in an electroless nickel plating solution for approximately 20 minutes. Electroless deposition of the metal corrosion barrier eliminates the need to have the remaining aluminum electrically connected. The metal corrosion barrier surface is then rinsed with demineralized water. Demineralized water is used to minimize the occurrence of any residual minerals on the surface of the metal corrosion barrier. The presence of minerals on the metal corrosion barrier will impair the adhesion of the solderable layer to the corrosion barrier. Rinsing with non-demineralized water is acceptable as long as any residual minerals are removed before plating the metal corrosion barrier with the solderable layer.
A solderable layer is then plated on the metal corrosion barrier. A typical solderable layer consists of either gold or silver.
One useful method of applying a solderable layer of gold to the metal corrosion barrier is to immerse the metal corrosion barrier in an electroless gold plating solution for approximately 30 minutes. Electroless deposition of the solderable layer eliminates the need to have the metal corrosion barrier electrically connected. The solderable layer is rinsed with demineralized water and dried.
While preferred embodiments of the present invention have been described, it is to be understood that the embodiments described are illustrative only and the scope of the invention is to be defined solely by the appended claims when accorded a full range of equivalence, many variations arid modifications naturally occurring to those of skill in the art from a perusal hereof.

Claims (20)

What is claimed is:
1. A method of creating a solderable metal layer on an exposed surface of a ceramic, glass, or glass ceramic member comprising the steps of:
(a) providing a ceramic, glass, or glass ceramic member having an exposed surface to receive a solderable layer;
(b) applying by ion vapor deposition an aluminum containing mixture film on the exposed surface of the member to thereby provide an aluminum containing mixture surface;
(c) applying a dry film photoresist to the aluminum containing mixture surface to thereby provide a photoresist film;
(d) applying a photomask to the photoresist film to thereby mask selected portions of the photoresist film;
(e) exposing the unselected portions of the photoresist film to ultraviolet light;
(f) removing the photomask to thereby expose the selected portions of the photoresist film;
(g) heating the photoresist film;
(h) removing the unselected portions of the photoresist film to thereby selectively expose the aluminum containing mixture surface;
(i) etching the exposed aluminum containing mixture surface to remove the exposed aluminum containing mixture and thereby selectively expose the surface of the member;
(j) removing the remaining photoresist film to expose the remaining aluminum containing mixture surface;
(k) plating of a corrosion inhibiting metal to the remaining aluminum containing mixture surface to thereby provide a corrosion barrier between the aluminum containing mixture and any subsequently applied solderable metal; and
(l) plating of a solderable metal to the corrosion barrier to thereby create a solderable metal layer on the member.
2. The method of claim 1, wherein the aluminum containing mixture surface in step (b) is prepared for the application of photoresist in step (c) by:
(A) cleaning the aluminum containing mixture surface to reduce the amount of aluminum oxide; and
(B) heating the aluminum containing mixture surface.
3. The method of claim 2, wherein the cleaning of the aluminum containing mixture surface in step (A) comprises the following steps:
(I) cleaning the aluminum containing mixture surface with a cleanser using a brass scrub brush;
(II) thoroughly rinsing the aluminum containing mixture surface with water;
(III) repeating steps (I) and (II) until the water ceases to bead on the aluminum containing mixture surface; and
(IV) drying the aluminum containing mixture surface to reduce the formation of water spots on the aluminum containing mixture surface.
4. The method of claim 2, wherein the aluminum containing mixture surface in step (B) is heated at 75° C. for 15 minutes.
5. The method of claim 1, wherein the aluminum containing mixture film in step (b) is at least 2 mils thick.
6. The method of claim 1, wherein applying the dry film photoresist to the aluminum containing mixture surface in step (c) occurs at a pressure greater than atmospheric pressure to provide a photoresist film approximately 1.5 mils thick.
7. The method of claim 1, wherein exposing the portions of the photoresist film which are not masked in step (e) comprises the following steps:
(A) exposing the portions of the photoresist film which are not masked to a negative pressure of at least 20 in. Hg.; and
(B) exposing the portions of the photoresist film which are not masked to an ultraviolet light source for 30 light units while maintaining the negative pressure of at least 20 in. Hg.
8. The method of claim 1, wherein the photoresist film in step (g) is heated at 95° C.±3° C. for approximately 30 minutes.
9. The method of claim 1, wherein the removing of the ultraviolet exposed portions of the photoresist film to selectively expose the aluminum containing mixture surface in step (h) occurs by exposure of the ultraviolet exposed portions of the photoresist film to an aqueous developing solution.
10. The method of claim 1, wherein etching the exposed aluminum containing mixture surface in step (i) occurs by spray etching the expose aluminum containing mixture surface with an aluminum etchant consisting of phosphoric acid, nitric acid, and acetic acid for approximately 45 minutes.
11. The method of claim 1, wherein removing the remaining photoresist film in step (j) occurs by inserting the remaining photoresist film into an alkaline photoresist stripping solution.
12. The method of claim 1, wherein the remaining aluminum containing mixture surface in step (j) is prepared for plating of a corrosion inhibiting metal in step (k) by:
(A) cleaning the remaining aluminum containing mixture surface to reduce the amount of aluminum oxide; and
(B) mild etching of the remaining aluminum containing mixture surface.
13. The method of claim 12, wherein the cleaning of the remaining aluminum containing mixture surface in step (A) comprises the following steps:
(I) cleaning the remaining aluminum containing mixture surface with a cleanser using a brass scrub brush;
(II) thoroughly rinsing the remaining aluminum containing mixture surface with water;
(III) repeating steps (I) and (II) until the water ceases to bead on the remaining aluminum containing mixture surface; and
(IV) drying the remaining aluminum containing mixture surface to reduce the formation of water spots on the remaining aluminum containing mixture surface.
14. The method of claim 12, wherein the mild etching of the remaining aluminum containing mixture surface in step (B) comprises the following steps:
(I) cleaning the remaining aluminum containing mixture surface in an agitated bath of acetone for 3 minutes; and
(II) inserting the remaining aluminum containing mixture surface into an agitated acid bath of 3% hydrochloric acid, 3% nitric acid, and 94% demineralized water for 3 minutes.
15. The method of claim 1, wherein the plating of a corrosion inhibiting metal to the remaining aluminum containing mixture surface in step (k) comprises the following steps:
(A) rinsing the remaining aluminum containing mixture surface in a demineralized water bath for 3 minutes; and
(B) applying a nickel film on the remaining aluminum containing mixture surface by immersing the remaining aluminum containing mixture surface in an electroless nickel plating solution for approximately 20 minutes to thereby provide a corrosion barrier between the aluminum containing mixture and any subsequently applied solderable metal in step (l).
16. The method of claim 1, wherein the plating of a solderable metal to the corrosion barrier in step (l) comprises the following steps:
(A) rinsing the corrosion barrier in a demineralized water bath;
(B) applying a gold film on the corrosion barrier by immersing the corrosion barrier in an electroless gold plating solution for approximately 30 minutes to thereby provide a solderable metal layer.
17. The method of claim 1, wherein said aluminum containing mixture is aluminum.
18. A method of creating a solderable metal layer on an exposed surface of a ceramic, glass, or glass ceramic member comprising the steps of:
(a) providing a ceramic, glass, or glass ceramic member having an exposed surface to receive a solderable layer;
(b) applying an aluminum containing mixture film to a thickness of at least 2 mils on a surface of the member by ion vapor deposition to thereby provide an aluminum containing mixture surface;
(c) cleaning and drying the aluminum containing mixture surface by
(i) cleaning the aluminum containing mixture surface with a cleanser using a brass scrub brush,
(ii) thoroughly rinsing the aluminum containing mixture surface with water,
(iii) repeating steps (i) and (ii) until the water ceases to bead on the aluminum containing mixture surface,
(iv) drying the aluminum containing mixture surface to reduce the formation of water spots on the aluminum containing mixture surface;
(d) heating the aluminum containing mixture surface at 75° C. for 15 minutes;
(e) applying a dry film photoresist to the aluminum containing mixture surface at a pressure greater than atmospheric pressure to provide a photoresist film approximately 1.5 mils thick;
(f) applying a photomask to the photoresist film to thereby mask selected portions of the photoresist film;
(g) exposing the unselected portions of the photoresist film to a negative pressure of at least 20 in. Hg;
(h) exposing the unselected portions of the photoresist film to an ultraviolet light source for 30 light units while maintaining the negative pressure of at least 20 in. Hg;
(i) removing the photomask to thereby expose the selected portions of the photoresist film;
(j) heating the photoresist film at 95° C.±3° C. for approximately 30 minutes;
(k) removing the unselected portions of the photoresist film by exposure of the unselected portions of the photoresist film to an aqueous developing solution for 2 to 3 minutes for selectively exposing the aluminum containing mixture surface;
(l) spray etching the exposed aluminum containing mixture surface with an aluminum etchant consisting of phosphoric acid, nitric acid, and acetic acid for approximately 45 minutes to remove the exposed aluminum containing mixture and thereby selectively expose the surface of the member;
(m) rinsing the exposed surface of the member in water for at least 2 minutes;
(n) removing the remaining photoresist film by inserting the remaining photoresist film into a bath of alkaline photoresist stripping solution for approximately 5 minutes;
(o) cleaning and drying the remaining aluminum containing mixture surface by
(A) cleaning the remaining aluminum containing mixture surface with a cleanser using a brass scrub brush,
(B) thoroughly rinsing the remaining aluminum containing mixture surface with water,
(C) repeating steps (A) and (B) until the water ceases to bead on the remaining aluminum containing mixture surface,
(D) drying the remaining aluminum containing mixture surface to reduce the formation of water spots on the remaining aluminum containing mixture surface,
(E) cleaning the remaining aluminum containing mixture surface in an agitated bath of acetone for 3 minutes,
(F) inserting the remaining aluminum containing mixture surface into an acid bath of 3% hydrochloric acid, 3% nitric acid, and 94% demineralized water for 3 minutes;
(p) electroless plating of nickel and gold to the remaining aluminum containing mixture surface by:
(1) rinsing the remaining aluminum containing mixture surface in a demineralized water bath for 3 minutes,
(2) applying a nickel film on the aluminum containing mixture surface by immersing the aluminum containing mixture surface in an electroless nickel plating solution for approximately 20 minutes to thereby provide a nickel surface,
(3) rinsing the nickel surface in a demineralized water bath for several minutes,
(4) applying a gold film on the nickel surface by immersing the nickel surface in an electroless gold plating solution for approximately 30 minutes to thereby provide a gold surface,
(5) rinsing the gold surface in a demineralized water bath for several mninutes;
(q) drying the gold surface to prevent the formation of water spots on the gold surface to thereby create a solderable metal layer.
19. The method of claim 18, wherein said aluminum containing mixture is aluminum.
20. A method of creating a solderable metal layer on a ceramic, glass, or glass ceramic member comprising the steps of:
(a) providing a ceramic, glass, or glass ceramic member;
(b) applying aluminum to a surface of the member by ion vapor deposition;
(c) applying a photoresist to the aluminum;
(d) applying a photomask to the photoresist;
(e) exposing the photoresist film to a light source;
(f) removing the photomask;
(g) heating the photoresist;
(h) removing the exposed photoresist;
(i) removing the exposed aluminum;
(j) removing the remaining photoresist;
(k) plating of a corrosion inhibiting metal to the aluminum; and
(l) plating of a solderable metal to the corrosion-inhibiting metal to thereby create a solderable layer.
US09/107,475 1998-06-30 1998-06-30 Method of creating a solderable metal layer on glass or ceramic Expired - Lifetime US6159663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/107,475 US6159663A (en) 1998-06-30 1998-06-30 Method of creating a solderable metal layer on glass or ceramic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/107,475 US6159663A (en) 1998-06-30 1998-06-30 Method of creating a solderable metal layer on glass or ceramic

Publications (1)

Publication Number Publication Date
US6159663A true US6159663A (en) 2000-12-12

Family

ID=22316807

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/107,475 Expired - Lifetime US6159663A (en) 1998-06-30 1998-06-30 Method of creating a solderable metal layer on glass or ceramic

Country Status (1)

Country Link
US (1) US6159663A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040149689A1 (en) * 2002-12-03 2004-08-05 Xiao-Shan Ning Method for producing metal/ceramic bonding substrate
US20040171200A1 (en) * 2001-05-18 2004-09-02 Akitoshi Maeda Active matrix substrate for liquid crystal display and its fabrication
CN103477615A (en) * 2011-02-18 2013-12-25 Pem管理股份有限公司 Window glass mounted fastener
CN106019861A (en) * 2016-07-04 2016-10-12 奥士康精密电路(惠州)有限公司 Method for quick developing of dry film
CN107889559A (en) * 2015-04-24 2018-04-06 阿莫善斯有限公司 The manufacture method of ceramic substrate and as the ceramic substrate manufactured by it
CN108398859A (en) * 2018-05-04 2018-08-14 中国振华集团云科电子有限公司 A kind of dry film developing method
US11044806B2 (en) * 2017-08-18 2021-06-22 Kinsus Interconnect Technology Corp. Method for manufacturing multi-layer circuit board capable of being applied with electrical testing
CN114959624A (en) * 2021-02-26 2022-08-30 台湾积体电路制造股份有限公司 Physical vapor deposition member and method of cleaning an electrostatic chuck

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3767398A (en) * 1971-10-26 1973-10-23 C Morgan Solid photoresist comprising a polyene and a polythiol
US4122215A (en) * 1976-12-27 1978-10-24 Bell Telephone Laboratories, Incorporated Electroless deposition of nickel on a masked aluminum surface
US4423137A (en) * 1980-10-28 1983-12-27 Quixote Corporation Contact printing and etching method of making high density recording medium
US5141829A (en) * 1990-09-10 1992-08-25 General Electric Company Method of preparing a photo-mask for imaging three-dimensional objects
US5169680A (en) * 1987-05-07 1992-12-08 Intel Corporation Electroless deposition for IC fabrication
US5308745A (en) * 1992-11-06 1994-05-03 J. T. Baker Inc. Alkaline-containing photoresist stripping compositions producing reduced metal corrosion with cross-linked or hardened resist resins
US5358826A (en) * 1989-04-25 1994-10-25 Cray Research, Inc. Method of fabricating metallized chip carries from wafer-shaped substrates

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3767398A (en) * 1971-10-26 1973-10-23 C Morgan Solid photoresist comprising a polyene and a polythiol
US4122215A (en) * 1976-12-27 1978-10-24 Bell Telephone Laboratories, Incorporated Electroless deposition of nickel on a masked aluminum surface
US4423137A (en) * 1980-10-28 1983-12-27 Quixote Corporation Contact printing and etching method of making high density recording medium
US5169680A (en) * 1987-05-07 1992-12-08 Intel Corporation Electroless deposition for IC fabrication
US5358826A (en) * 1989-04-25 1994-10-25 Cray Research, Inc. Method of fabricating metallized chip carries from wafer-shaped substrates
US5141829A (en) * 1990-09-10 1992-08-25 General Electric Company Method of preparing a photo-mask for imaging three-dimensional objects
US5308745A (en) * 1992-11-06 1994-05-03 J. T. Baker Inc. Alkaline-containing photoresist stripping compositions producing reduced metal corrosion with cross-linked or hardened resist resins

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040171200A1 (en) * 2001-05-18 2004-09-02 Akitoshi Maeda Active matrix substrate for liquid crystal display and its fabrication
US7037766B2 (en) * 2001-05-18 2006-05-02 Nec Lcd Technologies, Inc. Method of fabricating an active matrix substrate for liquid crystal display utilizing interconnection lines formed from multilayered films that include an aluminum-neodymium alloy layer
US20040149689A1 (en) * 2002-12-03 2004-08-05 Xiao-Shan Ning Method for producing metal/ceramic bonding substrate
CN103477615A (en) * 2011-02-18 2013-12-25 Pem管理股份有限公司 Window glass mounted fastener
CN107889559A (en) * 2015-04-24 2018-04-06 阿莫善斯有限公司 The manufacture method of ceramic substrate and as the ceramic substrate manufactured by it
CN107889559B (en) * 2015-04-24 2020-04-28 阿莫善斯有限公司 Method for manufacturing ceramic substrate and ceramic substrate manufactured thereby
CN106019861A (en) * 2016-07-04 2016-10-12 奥士康精密电路(惠州)有限公司 Method for quick developing of dry film
US11044806B2 (en) * 2017-08-18 2021-06-22 Kinsus Interconnect Technology Corp. Method for manufacturing multi-layer circuit board capable of being applied with electrical testing
CN108398859A (en) * 2018-05-04 2018-08-14 中国振华集团云科电子有限公司 A kind of dry film developing method
CN114959624A (en) * 2021-02-26 2022-08-30 台湾积体电路制造股份有限公司 Physical vapor deposition member and method of cleaning an electrostatic chuck

Similar Documents

Publication Publication Date Title
US6492201B1 (en) Forming microelectronic connection components by electrophoretic deposition
CA1238480A (en) Method of fabricating solar cells
KR102387227B1 (en) Method for producing metal/ceramic circuit board
US4652336A (en) Method of producing copper platforms for integrated circuits
US4978423A (en) Selective solder formation on printed circuit boards
US6159663A (en) Method of creating a solderable metal layer on glass or ceramic
US3528090A (en) Method of providing an electric connection on a surface of an electronic device and device obtained by using said method
US5486266A (en) Method for improving the adhesion of a deposited metal layer
US7468321B2 (en) Application of impressed-current cathodic protection to prevent metal corrosion and oxidation
CN110831343A (en) Surface treatment method for selective chemical silver deposition of DBC substrate
US4848646A (en) Method for depositing solder onto aluminum metal material
RU2225460C2 (en) Chemical coating method (options)
JPS59117115A (en) Method of producing semiconductor device
US3960741A (en) Etchant for removing metals from glass substrates
CN114334807A (en) Preparation method of microwave thin film integrated circuit
US6174561B1 (en) Composition and method for priming substrate materials
Heschel et al. Conformal coating by photoresist of sharp corners of anisotropically etched through-holes in silicon
JP2003096573A (en) Method for deposition of electroless plating film
JP6536442B2 (en) Method of manufacturing plated power module substrate
JP2017057486A (en) Production of substrate for plated power module
US6908684B2 (en) Promoting adhesion between a polymer and a metallic substrate
CN102731170A (en) Technology for coating film on surface of ceramic substrate
US20070269591A1 (en) Pad Metallisation Process
JPH0962013A (en) Cleaner for semiconductor device and production of semiconductor device
KR20060128559A (en) Surface process method for prevention whisker using ag under plating

Legal Events

Date Code Title Description
AS Assignment

Owner name: HARRIS CORPORATION, FLORIDA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MURRAY, JAMES R.;OZMAT, BURHAN;REEL/FRAME:009474/0065

Effective date: 19980630

AS Assignment

Owner name: INTERSIL CORPORATION, FLORIDA

Free format text: AMEND TO ADD PROPERTIES RECORDED ON REEL 10247, FRAME 0043.;ASSIGNOR:HARRIS CORPORATION;REEL/FRAME:010884/0394

Effective date: 19990813

AS Assignment

Owner name: CREDIT SUISSE FIRST BOSTON, AS COLLATERAL AGENT, N

Free format text: SECURITY INTEREST;ASSIGNOR:INTERSIL CORPORATION;REEL/FRAME:010351/0410

Effective date: 19990813

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

AS Assignment

Owner name: MORGAN STANLEY & CO. INCORPORATED,NEW YORK

Free format text: SECURITY AGREEMENT;ASSIGNORS:INTERSIL CORPORATION;TECHWELL, INC.;INTERSIL COMMUNICATIONS, INC.;AND OTHERS;REEL/FRAME:024329/0831

Effective date: 20100427

AS Assignment

Owner name: INTERSIL CORPORATION,FLORIDA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CREDIT SUISSE FIRST BOSTON;REEL/FRAME:024445/0049

Effective date: 20030306

FPAY Fee payment

Year of fee payment: 12

AS Assignment

Owner name: INTERSIL AMERICAS INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERSIL COMMUNICATIONS, INC.;REEL/FRAME:033262/0582

Effective date: 20011221

Owner name: INTERSIL AMERICAS LLC, CALIFORNIA

Free format text: CHANGE OF NAME;ASSIGNOR:INTERSIL AMERICAS INC.;REEL/FRAME:033262/0819

Effective date: 20111223

Owner name: INTERSIL COMMUNICATIONS, INC., CALIFORNIA

Free format text: CHANGE OF NAME;ASSIGNOR:INTERSIL CORPORATION;REEL/FRAME:033261/0088

Effective date: 20010523